as_numeric_without_warnings
                        Wrapper function to convert into numeric
                        without warnings
choose_with_menu        Choose data with menu.
clean_station           Clean up station information
climate_jp              Climate data in Japan
climate_world           Climate data in the world
download_climate        Download climate data of the world
download_links          Download links for areas, countries and
                        stations
gracefully_fail         Graceful fail
head_3                  Wrapper function to head 3 items
sleep                   Wrapper function to sleep
station_jp              Climate stations in Japan
station_links           Station name and its URL
station_world           Climate stations of the world
wi                      Calculate warm index and cold index
